Ice packs work on the principle of heat exchange: A cold object placed in direct contact with a warm object will absorb the heat of the warmer object.

Blood cells and other fluids will flow into spaces around damaged skin and muscle creating swelling and bruising. Applying ice to the damaged area lowers the metabolism and consumption of oxygen while constricting local blood vessels preventing fluid build up. The application of an ice pack will also numb nerve endings, easing the pain.

For this type of injury, heat can be detrimental. Heat increases blood flow and relaxes muscles, the metabolism will be increased and pain will become more intense.

Icepacks are also useful in the treatment of sporting injuries such as sprains or domestic ones such as scalds.

No refrigeration is required to use the SP Ice Pack, just squeeze the packet and apply. The pack has been designed to prevent freeze burns and so can be applied directly to the skin.

Instant cold compress for sports injuries, physiotherapy and any other emergency treatment